Plastic and nonmetallic article shaping or treating: processes – With severing – removing material from preform mechanically,... – To form particulate product
Patent
1985-03-21
1987-05-05
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
With severing, removing material from preform mechanically,...
To form particulate product
264237, 425311, B29B 906
Patent
active
046630996
ABSTRACT:
An extruder head 1 for molten material such as polymer has a die plate 6 orificed at 5, rotating blades 11 sweeping over the die plate to operate and fling outwards emerging short lengths 22 of molten material, and a surrounding freestanding wall or curtain of high-pressure water 14 around the blades to entrap and cool separate cut lengths without agglomeration. The wall of water can be formed of merging, or overlapping, flat jets from nozzle 13, and must be essentially uninterrupted viewed from the center of the die plate.
REFERENCES:
patent: 2850764 (1958-09-01), Evans et al.
patent: 4264553 (1981-04-01), Loo
patent: 4300877 (1981-11-01), Andersen
patent: 4385016 (1983-05-01), Gwinn
patent: 4461737 (1984-07-01), Voss
Anderson Philip
Extrudaids Limited
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